Vintagearms - Very nice indeed, I spent years looking for one and bought a Belgian example a couple of months ago, less desirable than your Hollis

A nice touch is the double I Hollis trademark (shown below on one of my Sniders), neither of my sporting Hollis' have one

How heavy is it? - mine at a touch under 19 lbs is just handleable

Definitely shoot it, (I have not shot mine yet, needs work on the nipple)

Jeff Tanner in the UK does very good reasonably priced RB moulds to any size (jt-bullet-moulds on internet)
With care you can measure bore and riling depth with a vernier calliper

Huvius - he could make one for your 6 bore if you wished

A patched ball is probably the way to go - Daryl - Where are youuuuuuuuu!!!!!!

The Hollis trademark

Full post is in the Muzzle loaders forum

Good luck in shooting, but a super rifle anyway

TH44